Introduction:

Boiling is different from burning. When water is boiled, the H₂O molecules become airborne, but do not break into hydrogen and oxygen. Alkanes can also be boiled without being burned, in which case the alkane molecule becomes airborne but remains flammable.

Activity:

• Study the ingredients and warnings on the aerosol cans provided. What do you notice?
• Watch the slideshow below to see how vaporizing molecules is so important in chemical energy.
• Drag the CE_Boiling document from my Teacher folder onto your laptop, open it, and follow the directions.
• Try the CE2: Boiling & Refineries exercise at Quia.

Assessment

1 Quality Point

Exercise is attempted with some success.

2 Quality Points

Exercise is attempted, and mostly successful.

3 Quality Points

Exercise is fully successful, regardless of number of attempts.

4 Quality Points

Exercise is supplemented with a coherent summary of the skills developed. NEW!! Submit this summary by email!!

5 Quality Points

Exercise is supplemented with a high-quality educational contribution for the class wikispace.
Can you find anything interesting about refineries in the Philadelphia area? Refinery fires? Propellants in aerosol cans?